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QAM16 symbol rate bandwidth amplitude relation

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Hello,I have a QAM16 modulation What is the relation between the simbol rate and the bandwidth and amplitude in the frequency domain?
I tried to read the following link ,i could not fimd direct formula

Quadrature amplitude modulation - Wikipedia

en.wikipedia.org en.wikipedia.org
 

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For baseband: symbol rate (Rs) = Bandwidth, achieved by applying pulse shaping at Nyquist. Irrespective of QAM rank.
In the air, bandwidth becomes double Rs as signal spectrum becomes two sided.
Amplitude : unrelated to symbol rate, depends on your implementation.
 

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